10 Essential Habits Every Programmer Should Master

1. Rely on official documentation when adopting new tech stacks

When introducing new JARs or middleware, always consult the official docs. Online articles are unreliable; for example, JUnit5 does not require the @RunWith(SpringRunner.class) annotation, contrary to many tutorials.

2. Quietly ensure code is bug‑free before delivery

Reliability is judged by low bug count. Even if code isn’t perfect, thorough self‑testing before handing it over demonstrates reliability.

3. Log input, output, and latency comprehensively

Logging helps locate logical and performance issues. Printing request/response data and timing enables quick diagnosis via grep, sort, or log‑analysis tools.

4. Master Git

Effective Git usage prevents merge and version‑upgrade bugs. A highly‑rated open‑source Git handbook (authored by a GitHub employee) covers best practices and underlying principles.

5. Prioritize functionality over premature optimization

Focus on delivering features first; optimize later based on actual usage patterns.

6. Implement well‑defined requirements before ambiguous ones

Separate clear requirements from vague ones, build a solid foundation for the former, then clarify the latter with product managers.

7. Proactively identify project problems and propose solutions

Finding and solving issues drives project momentum and personal growth.

8. Allocate buffer time in development schedules

Unexpected changes, personnel shifts, and optimistic estimates necessitate extra time; this buffer is not slack time but a safeguard.

9. Turn learning into code

Practical implementation of new technologies solidifies understanding; merely reading creates an illusion of mastery.

10. Improve English proficiency

Most technical documentation and innovations are in English; reading official docs and participating in global communities requires a decent command of English.